package com.wideplay.crosstalk.services;

import com.google.inject.Singleton;

import java.util.HashMap;
import java.util.Map;
import java.util.Collections;

import net.jcip.annotations.Immutable;

/**
 * @author Dhanji R. Prasanna (dhanji@gmail.com)
 */
@Immutable @Singleton
class InMemoryUserManager implements UserManager {
    private final Map<String, String> users;

    public InMemoryUserManager() {
        final Map<String, String> users = new HashMap<String, String>();
        users.put("dhanji", "dirocks");

        //freeze the current hardcoded map so that it is thread-safe
        this.users = Collections.unmodifiableMap(users);
    }

    //returns true if a username and password combination are valid against
    //registered entires
    public boolean authenticate(String username, String password) {
        return users.containsKey(username) && users.get(username).equals(password);
    }
}
